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Did 1968 and 1969 440-4 used the Vac retard valve? #141001
10/24/08 03:33 PM
10/24/08 03:33 PM
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ragtop Offline OP
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This would be the valve that I have seen on 1970 440-4 cars, that retard the timing under certain conditions. Were thes used on the 1968 or 1969 440-4 cars? Thanks.

Re: Did 1968 and 1969 440-4 used the Vac retard valve? [Re: ragtop] #141002
10/24/08 03:35 PM
10/24/08 03:35 PM
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JohnRR Offline
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I'll go out on a limb and say NO .

68 did have a valve , never seen it on a 440 , but it was not on the vac advance can and was not electric .

Last edited by JohnRR; 10/24/08 03:36 PM.
Re: Did 1968 and 1969 440-4 used the Vac retard valve? [Re: JohnRR] #141003
10/24/08 03:51 PM
10/24/08 03:51 PM

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"In the day" 70-74, I was envolved in working on many of my and my friends cars, A,B, E body. I've never seen anything earlier than '70 with one of these. My 70 440sixpack came with an iron Prestolite dual point, and did not have the retard, either. A friend had a 70 375hp 440 GTX, which did, as i recalls

Re: Did 1968 and 1969 440-4 used the Vac retard valve? [Re: ragtop] #141004
10/25/08 06:59 AM
10/25/08 06:59 AM
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Thanks.

Re: Did 1968 and 1969 440-4 used the Vac retard valve? [Re: ragtop] #141005
10/25/08 03:25 PM
10/25/08 03:25 PM
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John_Kunkel Offline
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The '70 distributor had a retard solenoid incorporated into the vacuum advance which served the same purpose as the "green valve".


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Re: Did 1968 and 1969 440-4 used the Vac retard valve? [Re: John_Kunkel] #141006
10/25/08 05:20 PM
10/25/08 05:20 PM
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Spokane Washington
ScottSmith_Harms Offline
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If you are talking about the C.A.P. Valve? Yes, all engines used them with California cars, I've seen them on non CA cars as well but I have not seen enough evidence to make a complete story on that. Here is a pic of a few different NOS units, from left to right: /6-318/383, center with the red bracket is for a 440 application, furthest to the right is a Hemi style.







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